occultation

/ˌɑkəlˈteɪʃən/
noun
  1. An event in which one celestial body hides another from view, as when the moon passes in front of a star or planet.
    • Astronomers predicted an occultation of Jupiter by the moon.
    • The lunar occultation of Mars was visible through a telescope.
    • We stayed up late to watch the occultation of a bright star.
  2. The act of hiding or concealing something.
    • In the story, the hero's identity remained in occultation until the end.
    • The occultation of the treasure map led to a long search.
    • The occultation of evidence delayed the investigation.
Antonyms
What does "occultation" mean? | whatsthatwordmean | whatsthatwordmean